US6557549B2 - Aerosol delivery apparatus with positive expiratory pressure capacity - Google Patents

Aerosol delivery apparatus with positive expiratory pressure capacity Download PDF

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Publication number
US6557549B2
US6557549B2 US09/833,019 US83301901A US6557549B2 US 6557549 B2 US6557549 B2 US 6557549B2 US 83301901 A US83301901 A US 83301901A US 6557549 B2 US6557549 B2 US 6557549B2
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United States
Prior art keywords
valve
exhalation
mouthpiece
inhalation
window
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US09/833,019
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US20020029779A1 (en
Inventor
James N. Schmidt
Daniel Engelbreth
Rick Blacker
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Trudell Medical International
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Trudell Medical International
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Priority to US09/833,019 priority Critical patent/US6557549B2/en
Assigned to TRUDELL MEDICAL INTERNATIONAL reassignment TRUDELL MEDICAL INTERNATIONAL ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLACKER, RICK, ENGELBRETH, DANIEL, SCHMIDT, JAMES N.
Publication of US20020029779A1 publication Critical patent/US20020029779A1/en
Priority to US10/389,257 priority patent/US6848443B2/en
Application granted granted Critical
Publication of US6557549B2 publication Critical patent/US6557549B2/en
Priority to US11/655,039 priority patent/USRE43174E1/en
Priority to US13/371,787 priority patent/USRE45068E1/en
Priority to US14/340,146 priority patent/USRE46050E1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0086—Inhalation chambers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0001—Details of inhalators; Constructional features thereof
    • A61M15/0013—Details of inhalators; Constructional features thereof with inhalation check valves
    • A61M15/0016—Details of inhalators; Constructional features thereof with inhalation check valves located downstream of the dispenser, i.e. traversed by the product
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0001—Details of inhalators; Constructional features thereof
    • A61M15/0018—Details of inhalators; Constructional features thereof with exhalation check valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816—Joints or connectors
    • A61M16/0841—Joints or connectors for sampling
    • A61M16/0858—Pressure sampling ports
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/208—Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B23/00—Exercising apparatus specially adapted for particular parts of the body
    • A63B23/18—Exercising apparatus specially adapted for particular parts of the body for improving respiratory function
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2208/00—Characteristics or parameters related to the user or player
    • A63B2208/12—Characteristics or parameters related to the user or player specially adapted for children

Definitions

  • the invention relates to an apparatus and method for performing Positive Expiratory Pressure (PEP) therapy. More particularly, this invention relates to a method and apparatus for performing PEP therapy alone or in conjunction with an aerosol delivery apparatus.
  • PEP Positive Expiratory Pressure
  • PEP therapy is used primarily in pulmonary secretion removal.
  • Devices used to perform PEP therapy provide positive pressure during expiration.
  • the patient or user exhales against a fixed orifice resistor and generates a pressure ranging approximately from 10-20 cm H 2 O.
  • the resistance orifice is an important consideration and frequently is initially set by a physician, veterinarian, or a skilled practitioner in the art. An orifice that is too large may result in a short exhalation that will not produce proper expiratory pressure. An orifice that is too small may result in a longer expiratory phase that raises the pressure above approximately 20 cm H 2 O and ultimately increases the work of breathing.
  • the airway is splinted open by the pressure. This causes the movement of secretions from the peripheral airways into the larger airways where they can be expelled.
  • PEP therapy usually lasts for about 10-20 minutes and is performed as required, generally 1-4 times per day. Typically, the patient performs 10-20 PEP breaths, removes the device from their mouth and follows this with a forceful exhalation. This final exhalation triggers a cough that loosens secretions.
  • an inhaled substance such as, but not limited to, a medicine or remedy.
  • aerosol delivery apparatus means any apparatus capable of producing and/or delivering a substance, such as, but not limited to, a medicine, in a form suitable for inhalation by a patient and includes, without limitation, an aerosol holding chamber, nebulizer, spacer with integrated actuator, a dry powder inhaler, and a metered dose inhaler.
  • One aspect of the present invention is directed to a positive respiratory pressure apparatus including a patient respiratory system interface and a valve assembly in fluid communication with the patient respiratory system interface.
  • the valve assembly has a valve configured to pass a fluid traveling in a predetermined direction from a first side to a second side of the valve, and a variable resistance bypass window positioned adjacent the valve and having a resistance to a fluid traveling in a direction opposed to the predetermined direction, where the variable resistance bypass window is continuously adjustable between a first fluid resistance and a second fluid resistance.
  • an apparatus is disclosed that is capable of performing positive expiratory pressure (PEP) therapy alone or in combination with providing a substance, generally in aerosol form.
  • the apparatus includes a positive pressure (PP) valve having a continuously variable respiratory window.
  • PP positive pressure
  • the term respiratory is intended to encompass both inhalation and exhalation. Whether inhalation resistance or exhalation resistance is called for will be known to one skilled in the art.
  • the valve may be located at or near the output end of an aerosol delivery apparatus.
  • the PP apparatus is associated with a mask.
  • the mask with the PP apparatus may be used alone or in combination with an aerosol delivery apparatus.
  • the PP apparatus is associated with a mouthpiece.
  • the mouthpiece with the PP apparatus may be used alone or in combination with an aerosol delivery apparatus.
  • the PP apparatus is associated with a nebulizer.
  • the nebulizer with the PP apparatus may be used alone or in combination with a patient respiratory system interface, such as a mask or mouthpiece.
  • the PP apparatus is associated with a spacer chamber with an integrated actuator.
  • the spacer chamber with the integrated actuator associated with the PP apparatus may be used alone or in combination with a mouthpiece or mask.
  • a pressurized metered dose inhaler canister is capable of association with an aerosol holding chamber having a PP valve associated therewith.
  • a pressurized metered dose inhaler canister is capable of association with an aerosol holding chamber engageable with a mouthpiece or mask having a PP valve associated therewith.
  • kits for performing positive expiratory pressure including an aerosol delivery apparatus, a mouthpiece and/or mask attachable to the output end of the aerosol delivery apparatus, and a PP apparatus.
  • the PP apparatus may be located on the aerosol delivery apparatus or the mouthpiece and/or mask.
  • the PP apparatus may be attached to the aerosol delivery apparatus or integrally formed with the apparatus.
  • the aerosol delivery apparatus, mouthpiece, and PP valve can be combined so as to accomplish positive expiratory therapy and administration of a substance, such as, but not limited to, a medicine in aerosol form. Any aerosol delivery apparatus may be used.
  • a backpiece is included for association with an aerosol delivery apparatus.
  • a pressurized metered dose inhaler can engage with the backpiece for delivery of a medicament.
  • One embodiment of a method of performing positive expiratory pressure therapy includes providing a PP apparatus with a valve that is capable of providing a continuously variable expiratory window. The method further includes performing a series of breaths. When exhalation is performed, the exhalant is directed through the continuously variable expiratory window. Performance of a therapeutic cough triggers the loosening of secretions. Upon loosening of the secretions, a substance, such as a medicament, may be provided for inhalation into the respiratory system.
  • the PP valve may be positioned so as to provide positive inspiratory pressure upon inhalation into the apparatus.
  • a further aspect of another embodiment includes association of a PP apparatus associable with a mask or mouthpiece engageable with a backpiece device.
  • the backpiece device includes a plastic or an elastomeric adapter suited to receive the mouthpiece of a pressurized metered dose inhaler.
  • One embodiment of a method of performing positive expiratory pressure therapy includes providing a positive expiratory pressure apparatus having a valve capable of providing a continuously variable resistance window, performing a series of breaths including inhalation and exhalation; exhaling so that the exhalant is directed through the continuously variable resistance window, performing a therapeutic cough triggering the loosening of secretions, and providing an inhaleable medicament.
  • Another embodiment of a method of performing positive expiratory pressure therapy includes providing a positive respiratory pressure apparatus having a valve capable of providing a continuously adjustable resistance to exhalation, where the valve is located in a mouthpiece attachable to a chamber.
  • a patient then executes a series of therapeutic breaths, including inhalation and exhalation, wherein the exhalant is directed through the continuously adjustable resistance window, the patient performs a therapeutic cough triggering the loosening of secretions, and medicament is provided via the chamber.
  • a method of performing positive expiratory pressure therapy in combination with providing an aerosolized medicament includes providing a positive expiratory pressure apparatus having a positive expiratory pressure valve capable of providing a continuously variable resistance window, where the valve is positionable in a mouthpiece and the mouthpiece attachable to an aerosol holding chamber. A series of therapeutic breaths, including inhalation and exhalation, are then taken where the exhalant is directed through the continuously variable resistance window.
  • the continuously variable resistance window is preferably capable of providing a variable back pressure to the exhalant.
  • a therapeutic cough capable of triggering the loosening of sections is performed and aerosolized medicament from the aerosol holding chamber is administered through inhalation.
  • One embodiment of an apparatus capable of performing positive respiratory pressure therapy in combination with providing an aerosolized medicament includes a positive respiratory pressure valve having a continuously variable resistance window; and an aerosol holding chamber having an output end, the positive respiratory pressure valve locatable at the output end.
  • Yet another embodiment of an apparatus capable of performing positive respiratory pressure therapy in combination with providing an aerosolized medicament includes a positive respiratory pressure valve having a continuously variable resistance window; an aerosol holding chamber having an input end and an output end, the positive respiratory pressure valve locatable at the output end; and a metered dose inhaler canister capable of association with the input end of the aerosol holding chamber.
  • a still further embodiment of a kit for performing positive expiratory pressure includes an aerosol holding chamber having an inlet and an outlet.
  • a backpiece is attachable to the inlet of the aerosol holding chamber with a metered dose inhaler capable of association with the backpiece.
  • a mouthpiece is attachable to the outlet of the aerosol holding chamber.
  • a positive expiratory pressure valve is generally locatable at the outlet end of the aerosol holding chamber, wherein the aerosol holding chamber, backpiece, mouthpiece, and positive expiratory pressure valve can be combined so as to accomplish positive expiratory therapy and administration of an aerosolized medicament.
  • An additional embodiment of an apparatus capable of performing positive expiratory pressure therapy in combination with providing an aerosolized medicament includes a positive expiratory pressure valve having a continuously variable resistance window, a mouthpiece, the positive expiratory pressure valve associable with the mouthpiece, and a nebulizer having an input end and an output end, the positive expiratory pressure valve associable with the output end.
  • FIG. 1 is a cross sectional view of a mouthpiece associable with a chamber in conjunction with a PP apparatus.
  • FIG. 2 is a perspective view of a mouthpiece associable with a chamber in conjunction with the PP apparatus.
  • FIG. 3 is an exploded view of the preferred embodiment.
  • FIG. 4 a is a front view of one embodiment of the PP apparatus.
  • FIG. 4 b is a cross section drawn along line A—A of FIG. 4 a.
  • FIG. 4 c is a back view of one embodiment of the PP apparatus.
  • FIG. 4 d is a cross section drawn along line B—B of FIG. 4 a.
  • FIG. 4 e is a sectional cross section drawn along line C—C of FIG. 4 a.
  • FIG. 4 f is a rear perspective view of the embodiment of FIG. 4 a.
  • FIG. 5 is a rear perspective of a mouthpiece according to a preferred embodiment.
  • FIG. 6 is a front perspective view of a mouthpiece with one embodiment of the PP apparatus.
  • FIG. 7 a is a front view of the fitting and manometer port.
  • FIG. 7 b is a cross section drawn along line A—A of FIG. 7 a of the fitting and port.
  • FIG. 8 a is a top view of one embodiment of the slide control.
  • FIG. 8 b is a side view of one embodiment of the slide control.
  • FIG. 8 c is a perspective view of one embodiment of the slide control.
  • FIG. 8 d is a cross section drawn along line A—A of FIG. 8 a.
  • FIG. 9 is a top perspective view of one embodiment of the slide control.
  • FIG. 10 is a perspective view of an alternative embodiment of the PP apparatus of FIGS. 1-3 showing detent notches in conjunction with a mouthpiece.
  • FIG. 11 is an exploded view of one embodiment showing a slide control having a port.
  • FIG. 12 is one embodiment of the slide control having a port.
  • FIG. 13 is one embodiment of the mouthpiece showing the annular sealing ring.
  • FIG. 14 is one embodiment showing a plurality of detent notches.
  • FIG. 15 is a side view of one embodiment of the control valve showing the port.
  • FIG. 16 is a concave perspective view of the slide control showing the port.
  • FIG. 17 is a concave bottom view of the slide control showing the port.
  • FIG. 18 is an exploded view of an alternative embodiment of the PP apparatus of FIGS. 8-10.
  • FIG. 19 is a cross-sectional view of the PP apparatus of FIG. 18 .
  • FIG. 20 is a perspective view of a duck-bill valve used in the PP apparatus of FIGS. 18-19.
  • FIG. 21 is a cross-sectional view of the duck-bill valve of FIG. 20 .
  • FIG. 22 a is a front exploded view of one embodiment of the PP apparatus in conjunction with a mouthpiece and associable with a spacer.
  • FIG. 22 b is a rear exploded view of one embodiment of the PP apparatus in conjunction with a mouthpiece and associable with a spacer.
  • FIG. 22 c is a front view of one embodiment of a valve showing the baffle.
  • FIG. 23 is a perspective view of one embodiment of a PP apparatus in association with a nebulizer.
  • FIG. 24 is an exploded view of one embodiment of the PP apparatus and a mouthpiece.
  • FIG. 25 is a perspective view of one embodiment of the PP apparatus in an open position and a mouthpiece.
  • FIG. 26 is a perspective view of one embodiment of the PP apparatus in a semi-open position and a mouthpiece.
  • FIG. 27 is an exploded view of one embodiment of the PP apparatus showing the disc and a mouthpiece.
  • FIG. 28 a is a top view of one embodiment of the PP apparatus and a mouthpiece.
  • FIG. 28 b is a cross section of one embodiment of the PP apparatus and a mouthpiece showing a plurality of prongs holding the PP apparatus.
  • FIG. 29 is an exploded view of a PP apparatus associated with a mouthpiece and having an inhalation valve.
  • FIG. 30 is an exploded view of a PP apparatus associated with a mouthpiece and having an exhalation valve.
  • FIG. 31 is a further perspective view of one embodiment of the PP apparatus in conjunction with a mask having an opening for association with a chamber.
  • FIG. 32 a is a close up of one embodiment of the PP apparatus in a fully open position in conjunction with a mask.
  • FIG. 32 b is a cross section of one embodiment of the PP apparatus in a fully open position in conjunction with a mask.
  • FIG. 33 a is a close up of one embodiment of the PP apparatus in a partially open position in conjunction with a mask.
  • FIG. 33 b is a cross section of one embodiment of the PP apparatus in a partially open position in conjunction with a mask.
  • FIG. 34 a is a close up of one embodiment of the PP apparatus having a plurality of variable sized flow ports, in conjunction with a mask.
  • FIG. 34 b is a cross section of one embodiment of the PP apparatus having a plurality of variable sized flow ports, in conjunction with a mask.
  • FIG. 35 a is a front exploded view of a close up of one embodiment of the PP apparatus having a plurality of variable sized flow ports, in conjunction with a mask.
  • FIG. 35 b is a rear exploded view of a close up of one embodiment of the PP apparatus having a plurality of variable sized flow ports, in conjunction with a mask.
  • FIG. 36 is a front view of one embodiment of the PP apparatus showing resistance setting indicia.
  • FIG. 37 shows a perspective view of a spacer for a pressurized metered dose inhaler with one embodiment of the PP apparatus.
  • FIG. 38 a is a perspective view of one embodiment of the resistance window in the open position.
  • FIG. 38 b is a perspective view of the embodiment of FIG. 38 a with the resistance window in a closed position.
  • FIG. 39 a is a perspective view of one embodiment of the resistance window in the open position.
  • FIG. 39 b is a perspective view of one embodiment of the resistance window in the closed position.
  • FIG. 40 illustrates an alternative embodiment of the apparatus of FIGS. 37 - 39 .
  • FIGS. 1-3 show one embodiment of an assembly 10 for performing positive expiratory pressure (PEP) therapy where the assembly incorporates a positive pressure (PP) device having a PP valve 12 .
  • the assembly 10 includes an aerosol delivery apparatus, such as an aerosol holding chamber 14 , and a patient respiratory system interface, such as a mouthpiece 16 and/or mask attachable to the output end of the aerosol delivery apparatus.
  • the PP valve 12 may be located on the aerosol delivery apparatus or the patient respiratory system interface.
  • the assembly 10 combines the aerosol delivery apparatus, mouthpiece, and PP valve into a tool for use in both positive expiratory therapy and administration of a substance, such as a medicament, in aerosol form. Any aerosol delivery apparatus suitable for generating an aerosol of the desired substance may be used.
  • a backpiece 18 is attachable to the inlet 20 of the aerosol holding chamber 14 .
  • a metered dose inhaler (not shown) may be connected with the backpiece 18 .
  • the mouthpiece 16 is attachable to the outlet end 22 of the aerosol holding chamber 72 .
  • the PP valve 12 is generally locatable at the outlet end 22 of the aerosol holding chamber 14 .
  • FIG. 3 depicts an exploded view of the PEP assembly showing an annular valve 24 positioned between the outlet end 22 and the mouthpiece 16 . More details on the aerosol holding chamber 14 disclosed in FIGS. 1-3 may be found in U.S. Pat. No. 4,470,412 and U.S. patent application Ser. No. 09/287,997 incorporated above.
  • the aerosol holding chamber 14 is provided with an annular valve 24 located at its outlet end 22 .
  • the annular valve 24 allows the user to inhale medicament from the chamber 14 , but prevents exhalation back through the chamber.
  • a PP valve 12 may be formed in a mouthpiece 16 .
  • the PP valve 12 includes a slide control 26 that is movably positioned relative to a resistance window 28 .
  • the slide control 26 is variably maneuverable to cover or uncover the resistance window 28 in a continuous manner. Further, the movement of the slide control 26 includes, but is not limited to, covering or uncovering, and/or opening or closing, the resistance window 28 or any variations thereof.
  • the PP valve 12 may be located on or in conjunction with a mouthpiece 16 .
  • An exemplary embodiment of the mouthpiece 16 shown in FIGS. 4 a - 4 f has a distal end 30 and a proximal end 32 .
  • the proximal end 32 of the mouthpiece is inserted or associated with the mouth or nostrils of the user.
  • the distal end 30 of a mouthpiece may or may not be associated with an aerosol delivery apparatus and the mouthpiece alone may be configured to constitute a PEP device.
  • the PP valve 12 may be located at or near the distal end 30 of the mouthpiece 16 .
  • the PP valve 14 may be located anywhere on the mouthpiece 1 and its location is not to be limited.
  • the PP valve 12 may be located at or near the output end 20 of the aerosol delivery apparatus, such as, but not limited to, the aerosol holding chamber 14 of FIGS. 1-3.
  • the direction of travel of any fluid, particularly an aerosol or nebulizer medicament is in the direction from the input end 20 , through the channel or chamber body, and to or out the output end 22 . This direction of travel from input end 20 to output end 22 is referred to as travel from downstream to upstream.
  • the mouthpiece 16 is formed of plastic.
  • the plastic may be either rigid or soft.
  • Other materials that can also be used for the mouthpiece 16 include metal or other materials known to one in the art.
  • a tab 34 is provided allowing for the connection of a cap 36 , as shown in FIG. 2, to cover the proximal end 32 of the mouthpiece 16 .
  • the mouthpiece 16 may include indicia 35 , or setting indications, representing the resistance setting.
  • the indicia 35 may be in the form of numbers, bars, colors, a series of dots or the like.
  • the PP apparatus 10 may includes a fitting 39 sized for placement over the proximal end of the mouthpiece.
  • the fitting 39 includes a manometer port 41 extending from the fitting over which a manometer can be attached.
  • the fitting 39 is formed of a plastic.
  • the plastic may be either rigid or soft. Other materials that can also be used to form the fitting include metal.
  • FIGS. 3, 8 a - 8 d and 9 show an embodiment of the slide control 26 of the PP apparatus 10 .
  • the slide control 26 is of a semi-circular, quarter moon shape.
  • the slide control 26 has a first lateral side 38 concave in shape and a second lateral side 40 opposite the first side 38 .
  • the slide control 26 also has a top 42 and a bottom 44 surface. From the top surface 42 of the slide control 26 extends a tab setting 46 .
  • the tab setting 46 is a uniformly molded projection from the slide control 26 .
  • the tab setting 46 has smooth edges for easy engagement with the finger, thumb or appendix of the user.
  • the tab setting 46 may also have a serrated edge or any other edge known in the art.
  • the tab setting 46 projects through the mouthpiece from the tab window 48 .
  • the user of the device manipulates the tab setting 46 in such a manner as to cause, either directly or indirectly, the movement of the slide control 26 thereby varying the opening of the resistance window 28 .
  • the tab window 48 is arcuate in shape, parallel to the contour of the circumference of the mouthpiece 16 .
  • the slide control 26 is preferably seated in a channel 50 located on the mouthpiece 16 .
  • the slide control 26 is held within the channel 50 by at least one tooth 52 .
  • Located on one or both of the walls of the channel 50 is a stepped surface 54 as shown in FIG. 5 .
  • the control arm 56 of the slide control 26 is shown having a finger protection 58 from one end of the slide control 26 .
  • the slide control 26 may have a control arm 56 located on both ends of the slide control 26 .
  • the finger projection 58 is capable of engagement with the stepped surface 54 inside the mouthpiece shown in FIGS. 4 c and 5 .
  • the stepped surface 54 includes a series of ribs extending a variable length of the internal diameter of the mouthpiece 16 .
  • the stepped surface 54 may also be located along the tab window 48 . Therefore, the location of the stepped surface 54 may vary while remaining engageable by the control arm 56 .
  • the stepped surface 54 may be located on either or both of the internal walls of the channel 46 .
  • the slide control 26 is of a flexible material so that the control arm 56 can slide across the uppermost surface of the ribs projecting from the stepped surface 54 .
  • the control arm 56 engages in a semi-locked manner the ribs projecting from the stepped surface 54 .
  • the end of the slide control 26 opposite the control arm 56 may either be provided with a finger projection 58 or may be smooth.
  • the length of the slide control 26 extending from the tab setting 46 to the end of the control arm 56 opposite the projection 58 is generally the length of the resistance window 28 .
  • This resistance control length 60 is at least the length that the resistance window 28 can be opened allowing for exhalant to exit the window 28 .
  • the slide control 26 is manufactured of a plastic.
  • the plastic may be either rigid or soft.
  • Other materials that can also be used for the slide control 26 include metal or other materials known in the art.
  • the resistance window 28 may be an opening of any size or shape in the walls defining the channel 46 in the mouthpiece 16 which, in conjunction with the illustrated embodiment of the slide control 26 , provides an opening in the mouthpiece 16 to produce sufficient pressure during exhalation of the patient performing PEP therapy.
  • the resistance window 28 may be formed with straight or slanted edges. If the edges are slanted, this provides a steeped effect to the resistance window 28 . If the desired exhalation pressure is determined to range from 10-20 cm H 2 O, then the resistance window 28 in conjunction with the slide control 26 , acting as a cover or closure mechanism for the resistance window 28 , are sized in such a manner as to provide an appropriate opening for the desired exhalation pressure to be produced.
  • the length of the window may be of a longer length so as to provide a large enough opening through which PEP therapy is performed.
  • the resistance window length 60 of the control arm 26 is generally longer to cover the desired amount of the resistance window 28 .
  • the control arm 26 may provide a continuously adjustable variable resistance window between a first position where the control arm completely blocks the window 28 , to a second position where the control arm leaves the window completely open.
  • FIGS. 10-17 An alternative embodiment of an assembly 100 for performing PEP therapy is shown in FIGS. 10-17. This embodiment is similar to the embodiment of FIGS. 11-13, but utilizes a variation of the resistance window and slide control in the PP valve 112 .
  • the resistance window 128 and slide control 126 are positioned in the mouthpiece 116 .
  • the tab setting 146 of the slide control 126 is of a flexible material.
  • a detent 158 protrudes from the first tab setting face 156 located on the concave side 125 of the slide control 126 .
  • a position indicating rib 159 is located on the tab setting 146 opposite the detent 158 .
  • the rib 159 is shown as a generally rectangular protrusion from the surface of the tab setting 146 .
  • the rib 159 may be any shape protrusion, such as but not limited to circular, triangular.
  • the rib 159 may not be a protrusion at all but rather is a concave marking on the surface of the tab setting 146 .
  • the rib 159 has at least the function of indicating to the user the extent of the opening of the resistance window 128 . Therefore, one skilled in the art can envision a variety of marking, shapes, indents or protrusions, or colors which serve at least the function of indicating the extent of the opening of the resistance window 28 .
  • the detent 158 located on the tab setting 146 is associated with at least one detent notch 154 as shown in FIGS. 10 and 14.
  • the flexible tab setting 146 is movable within the tab window 148 .
  • the one or more detent notches 154 are preferably located along the boundary of the tab window 148 and indicia 135 , representative of exhalation effort corresponding to the position of the slide control 126 , are arranged adjacent the respective detent positions.
  • FIGS. 10 and 14 show a plurality of detent notches 154 .
  • the flexible tab setting 146 is moved along the tab window 148 .
  • the detent 154 located on the first tab fitting face 125 of the tab setting 146 moves into and out of engagement with the detent notches 154 .
  • Movement along the boundary and engagement with the detent notches 154 removably fixes the slide control 126 in a variety of positions. Each varied position provides for a further opening or closing of the resistance window 128 .
  • the detent 158 is not limited to being engaged with a detent notch but may be engaged or seated at any point along the boundary. Engagement with, or seating within, a detent notch 154 of a detent 158 provides for a variable securely fixed opening of the resistance window 128 .
  • Each detent notch 154 may correspond to a particular size opening or pre-set opening of the resistance window 128 . Therefore, by engagement of the detent 158 within the detent notch 154 , the user may be provided with a pre-set resistance window opening 128 . Yet, the detent notch 154 may also be positioned anywhere along the boundary providing for a continuously variable resistance window opening 128 .
  • the slide control 126 as shown in FIGS. 15 , 16 and 17 has located therein a port 143 .
  • the port 143 may be of any size or shape and in the illustrated embodiment is generally a rounded triangle having an elongated point.
  • the port 143 operates in conjunction with the resistance window 128 .
  • the size of the opening through which the exhalant passes is determined by how much of the port 143 is left uncovered or open and aligned with the resistance window 128 .
  • the slide control 126 is provided with a closure area 145 , as shown in FIG. 16 . Further, the slide control 126 is provided additionally with a port area 160 .
  • the closure area 145 of the slide control 126 is congruent with or aligned with the resistance window 128 .
  • the port area 160 containing the port 143 is brought into alignment with the resistance window 128 in the mouthpiece 116 .
  • a continuously variable opening is provided. For example, as the slide control 126 moves aligning a greater and greater amount of the port 143 with the resistance window 128 , a greater opening or path for the exhalant is provided.
  • the slide control 126 is seated in a channel 150 located on the mouthpiece 116 .
  • the slide control 126 is slidably movable within the channel 150 in the manner described above so as to continuously variably align the port 160 with the resistance window 128 .
  • a retaining ridge 162 fits into the channel 150 thereby holding the slide control 126 in its desired position throughout its range of motion in the mouthpiece.
  • the desired position of the slide control 126 is as close as possible to the annular sealing ring 164 shown in FIG. 13 .
  • the annular sealing ring 164 may optionally be provided with at least one locating ring or post 166 to help maintain the slide control 126 in alignment.
  • a patient's exhalation effort is controlled by adjusting the slide control over the resistance window so that the patient's exhaled air, which is prevented from entering the aerosol chamber 114 by the annular valve 124 and a baffle (not shown), must exit through the resistance window and provide a desired exhalation resistance. More specifically, during inhalation the inner diameter 127 of the annular valve 124 (FIG.
  • the exhalation flange 186 of the valve 124 flexes to seal against the outer ridge 188 (FIG. 13) formed inside the mouthpiece 116 to prevent ambient air from entering the mouthpiece.
  • the process is reversed and the inner diameter 127 prevents exhalant from entering the aerosol holding chamber while the exhalation flange 186 flexes away from the outer ridge 188 .
  • the exhalant preferably passes through the resistance window 128 and may escape to the outside between the exhalation flange and the mouthpiece, and then through the gap between the mouthpiece and aerosol holding chamber.
  • the aerosol delivery apparatus includes a chamber housing 214 having an input end 220 and an output end 222 .
  • the chamber housing 214 , input end 220 , and output end 222 define an interior space 223 .
  • the apparatus may also include an elastomeric backpiece which may be similar to the backpiece in the embodiment shown in FIGS. 1-3.
  • the output end 222 of the chamber housing 214 is shaped to receive the mouthpiece 216 and includes locking tabs 281 and a protrusion 283 .
  • the protrusion 283 is preferably annular in shape.
  • the locking tabs 281 are spaced apart around the outside of the output end 222 .
  • the mouthpiece assembly 216 is preferably substantially similar to that illustrated in FIGS. 10-15.
  • the mouthpiece assembly includes an annular sealing ring 224 , and a resistance window defined by a gap 225 in the sealing ring.
  • a slide control 226 is slidably seated in a channel 250 between the annular sealing ring and support posts or a support ring.
  • the tab setting 246 protrudes from the tab window 248 in the mouthpiece 216 .
  • the continuously variable resistance function is achieved as described above, using either embodiment of slide control and nozzle described above.
  • a containment baffle 275 may be integrally formed with the chamber housing 214 from a single piece of material and located near the outlet end 222 .
  • the containment baffle 275 includes connecting members 276 that extend from the edge of the containment baffle to the inner diameter of the output end 222 in the chamber housing. Vents 277 are defined between the outer perimeter of the containment baffle and the inner diameter of the outlet end of the chamber housing and are separated by the connecting members.
  • vents 277 are arcuate in shape and conform to the outer perimeter of the containment baffle 275 .
  • the containment baffle is dome-shaped where the concave end points towards the chamber 223 .
  • the containment baffle may be any of a number of geometric shapes.
  • a valve 278 having a valve member 279 and a valve seat 280 is shown.
  • the valve seat 280 preferably comprises the rim of the valve and the corresponding raised lip 283 on the outlet end 222 of the chamber housing 214 .
  • the valve member has a sealing surface that preferably forms between two parallel portions, or lips, of the valve.
  • the valve material seals against itself when fluid flows against a predetermined flow direction of the valve.
  • the valve is a duck-bill valve where the valve seat 280 is positioned axially away from the valve opening.
  • the valve 278 defines a central open area toward the end having the valve seat.
  • the valve member 279 shown as parallel sealing lips in FIGS.
  • valve seat 280 also provides a seal against the chamber housing 214 during exhalation so that exhalant from a patient must be directed through the continuously variable resistance window in the mouthpiece.
  • the duck-bill valve 278 has a central open area 274 at its base that has a diameter of approximately 26.09 millimeters (mm).
  • the width of the lips that form the valve member 279 is approximately 21.35 mm and the angle at which the walls 285 converge is approximately 72 degrees.
  • the height of the duck-bill valve 278 measured from the upper portion 282 of the valve seat to the valve member 279 is approximately 18.8 mm.
  • the mouthpiece 216 for containing this valve 278 preferably includes a resistance widow gap 225 having a length of 59 degrees of arcuate cut in the annular sealing ring 224 , where the annular sealing ring is approximately 31.4 mm in diameter and has a height of 4.5 mm.
  • valve is adjacent to the output end of the chamber housing.
  • annular valve embodiment of FIGS. 1-3 and 10 - 17 the inner portion of the valve covers the vents at the outlet end of the chamber housing.
  • duck-bill embodiment of FIGS. 18-21 the entire outlet end is covered by the valve.
  • the mouthpiece and outlet end of the chamber housing traps the valve in place. Inhalation by the patient causes the sealing portion of the annular valve to move, or alternatively the lips of the duck-bill valve to separate, and permit fluid to pass. Fluid from the chamber housing may be inhaled into the patient's respiratory system through the mouthpiece. The patient may then exhale into the mouthpiece.
  • Exhalation by the patient results in air traveling through the mouthpiece in a direction opposite the predetermined inhalation flow path of the valve.
  • This air which is blocked from passage through the valve along the inhalation path, then passes along a second path through the resistance window in the mouthpiece.
  • the force of the exhaled air causes the outer portion of the valve to move away from the mouthpiece in a direction towards the chamber housing.
  • an exhalation pathway is created between the outer portion of the valve and the mouthpiece through which the exhaled air passes out to the atmosphere or some other predetermined location.
  • the amount of effort that exhalation requires is set by the slide control, which may be set to block the appropriate amount of the resistance window to achieve the desired resistance.
  • the duck-bill valve 278 assists both in preventing inhalation of ambient air through the resistance window 225 and providing an exhalation path for exhalant.
  • the upper portion 282 of the valve seat seals against the annular sealing ring 224 except for the gap in the annular sealing ring 224 defining the resistance window 225 .
  • fluid flows through the central opening 274 and out the lips of the valve member 279 .
  • the exhalation flange 286 flexes toward the proximal end of the mouthpiece and provides a secondary seal against the outer ridge 288 inside the mouthpiece.
  • the outer ridge 288 is preferably continuous around the inner circumference of the mouthpiece. Upon exhalation, the lips of the valve member 279 close, the exhalant passes through the resistance window under the upper portion 282 of the valve seat positioned adjacent the resistance window opening, and the exhalation flange flexes away from the outer ridge 288 and out between the aerosol holding chamber 214 and mouthpiece 216 .
  • an embodiment of an apparatus 310 for performing PEP therapy is disclosed that may be used with or without an aerosol delivery apparatus.
  • the PEP apparatus of FIGS. 22 a - 22 c is a standalone PEP device in a mouthpiece incorporating the previously discussed continuous variable resistance window with slide control, and variations thereof, along with a self contained valve 378 that may be similar to that disclosed in the previous embodiments.
  • the valve 378 need not be found on the outlet end of a separate chamber extension 314 but may be positioned on the distal end 330 of the mouthpiece.
  • the valve 378 may be an annular valve.
  • the 378 is preferably retained toward the distal end 330 of the apparatus by a central baffle 385 supported by radial spokes 386 .
  • the PEP apparatus 310 is formed of an attachable mouthpiece section 316 and a baffle section 317 .
  • the mouthpiece and baffle sections 316 , 317 may be removably joined using snap-fit, threaded or other known attachment schemes.
  • the mouthpiece and baffle sections 316 , 317 may be integrally molded or welded shut to form a non-removable, unitary piece.
  • An extended inlet 314 without any valves, may be used with the stand-alone PEP device 310 to enhance delivery of any medicine to the patient's respiratory system.
  • One function of the extended inlet is to provide a chamber for the dispensed particles from the pressurized metered dose inhaler.
  • a pressurized metered dose inhaler may be coupled to the extended inlet with a backpiece and medicament supplied from the pressurized metered dose inhaler can be delivered directly to the user.
  • FIGS. 1-22 illustrate annular and duck-bill valves 24 , 124 , 278 , 378
  • a preferred valve is capable of passing a fluid moving in a first direction along a first path and also capable of passing a fluid moving in an opposite direction along a second path.
  • inhalation draws fluid through a central opening in the valve while the perimeter of the valve prevents fluid flow.
  • exhalation closes the path through the central opening and directs fluid along a second path around the perimeter of the valve.
  • Other paths may also be used.
  • FIGS. 23-28 illustrate another embodiment of a PEP apparatus 410 .
  • the PEP apparatus 410 has a patient respiratory system interface, such as a mouthpiece 416 , on a proximal end 432 and may be connected with an aerosol delivery apparatus, in this example a nebulizer 414 , at a distal end 430 .
  • the PEP apparatus includes a PP valve 412 positioned on top of the mouthpiece 416 .
  • the PP valve 412 preferably consists of a cover 417 that may be removably attached to a receiving area 419 (FIG. 24) on the mouthpiece 416 .
  • the cover has a resistance window 428 and a tab window 448 extending through a top surface.
  • a slide control 426 in the form of a disk with vents 460 extending through the thickness of the disk is movably positioned under the cover 417 .
  • a one-way valve 423 is positioned between the slide control 426 and the top of the mouthpiece 416 to allow air exhaled into the proximal end 432 to escape through the resistance window 428 while preventing any air from entering through the resistance widow during inhalation.
  • the resistance window 428 is shown generally as a pie-slice shaped cut-out with the point of the pie-slice removed so as to form a concave edge.
  • the resistance window 428 may be any shape and should not be limited by the illustrated embodiment.
  • a plurality of resistance windows 428 may form the PP valve 412 .
  • the number of windows 428 is not intended to be limited by the illustrated embodiment.
  • the slide control 426 is shown as a circular disc having a pie-slice shaped cut-outs with the point of the pie-slice openings therein which correspond to the openings of the resistance window 428 .
  • aligning the openings 460 of the disc with the resistance window 428 controls the opening of the continuously variable resistance window 428 .
  • the resistance windows 428 are aligned with the disc openings 460 , the resistance windows 428 are opened to their fullest extent allowing the resistance of the exhalant exiting the PP valve 412 to be lower.
  • the resistance of the exhalant exiting the PEP apparatus 410 is increased.
  • the vents may be adjusted in the disk 417 to any of a number of positions, thereby providing a continuously adjustable resistance. In this manner, positive expiratory pressure is controlled.
  • nebulizer Upon inhalation, the nebulizer will provide an aerosol to the inhaling patient via the mouthpiece.
  • a suitable nebulizer for use with the PEP apparatus 410 is a breath-actuated nebulizer such as disclosed in U.S. Pat. No. 6,044,841 issued Apr. 4, 2000 and entitled “Breath Actuated Nebulizer with Valve Assembly Having Relief Piston”, the entirety of which is incorporated herein by reference.
  • a piston 452 is drawn down by negative pressure created by the inhalation in the nebulizer and ambient air is drawn through openings 454 in the lid 456 of the nebulizer 414 .
  • the one-way valve 459 in the PP valve assembly 412 remains shut during inhalation.
  • a positive pressure builds in the nebulizer 414 and the piston acts as a one-way valve to close off the flow of air out of the nebulizer.
  • the exhalant must travel through the one-way valve in the PP valve assembly 412 , through the slide control and out the resistance window.
  • the slide control 426 under the resistance window 428 has been set to the appropriate position for the patient so that effective PEP therapy may be provided.
  • the PEP apparatus of FIGS. 23-27 uses an aerosol delivery apparatus such as the nebulizer 414 to restrict air flow through any opening other than the PP valve assembly 412 , other embodiments, such as shown in FIG.
  • FIGS. 23-28 show an improved nebulizer 414 associated with a PEP apparatus 410 having a PP valve 412 .
  • the nebulizer may be used alone or in combination with a mouthpiece mounted PP valve 412 or mask mounted version of the PP valve discussed below.
  • FIG. 29 shows an alternative embodiment of the PEP apparatus 410 of FIGS. 23-28 that may be used alone or coupled to a nebulizer or other aerosol delivery apparatus.
  • the mouthpiece 462 is provided with a one-way inhalation valve assembly 463 having a membrane 464 captured in an outlet cover 465 attached to the distal end 466 of the mouthpiece.
  • the flexible membrane preferably covers vents in the outlet cover 465 during exhalation and flexes to allow fluid flow during inhalation.
  • a PP valve assembly 467 is positioned on top of the mouthpiece. The PP valve assembly 467 differs from the PP valve assembly 412 in FIGS.
  • the slide control 468 contains a circular opening 469 that is moved by the tab setting 469 under a tear-drop shaped resistance window 471 in the cover 472 .
  • the inhalation valve 463 allows for fluid to enter the mouthpiece 462 but prevents fluid from exiting the mouthpiece.
  • the exhalation valve 473 allows for exhalation through the resistance window 471 but prevents inhalation of particles or fluid.
  • a gap is presented between the exhalation valve 402 and the disc 56 in order to allow the exhalation valve 402 to open upon exhalation. In this manner, the mouthpiece 462 is adapted to be used alone and not in conjunction with a nebulizer or other aerosol delivery apparatus.
  • FIG. 30 shows one embodiment, similar in concept to the embodiment of FIG. 29, but with the PP valve 475 attached in series with the one-way inhalation valve 476 , rather than in series with the one-way exhalation valve, to provide for resistance upon inhalation only.
  • the arrows drawn in FIG. 30 depict the direction of travel from the downstream end of the mouthpiece 478 to the upstream end of the mouthpiece showing that all inhalation must pass through the continuous variable resistance window 480 and the port 482 of the slide control 484 .
  • PP valves may be placed in series with both the one-way input and one-way output valves to allow for simultaneous control of positive inspiratory and expiratory pressures at the same or different levels.
  • FIGS. 31-35 A PP apparatus 510 utilizing a mask 512 as the interface is illustrated in FIGS. 31-35.
  • the mask may be a standard mask sized for adults or children and constructed of any of a number of materials such as silicon rubber.
  • the mask 512 may have a frustoconical shaped main section 514 sized to cover the patient's mouth and a nosepiece section 516 sized to cover a patient's nose.
  • a central opening 518 in the mask 512 may be used to attach with an aerosol delivery apparatus such as the aerosol holding chamber 14 shown in FIGS. 1-3, and other aerosol delivery apparatus.
  • the mask 512 may be fitted with a one-way valve in the central opening 518 for use as either a positive expiratory pressure device or a positive inspiratory pressure device.
  • a PP valve assembly 520 is positioned on the device so that inspiration and exhalation paths travel off-axis from one another.
  • the PP valve assembly 520 has an adjustable valve assembly cover 534 with tab window 522 and resistance window 528 openings positioned on it.
  • the resistance window 528 is generally an oblong, tear-drop shape and the tab window 522 defines an arcuate opening in the PP valve cover 534 .
  • the tab window and resistance window may alternatively be rectangular, oval or any other shape.
  • the PP valve assembly 520 has a fixed opening 530 and a set of detents 532 positioned on a disk-shaped platform 526 that connects to the nosepiece section of the mask through complementary tab 542 and slot 544 connectors.
  • the PP valve cover 534 has a protrusion 536 sized to cooperate with the detents 532 on the platform 526 so that the valve cover may be moved to predetermined spots when the valve cover is rotated against the platform.
  • An axle 538 on the valve cover fits into a central opening 540 in the platform 526 so that the resistance window 528 is rotatably positionable over the exhalation port 530 and the tab window 522 lines up with the tab extending from the platform 526 .
  • This embodiment depicts the resistance window 528 as a curved tear-drop like shape.
  • the platform 526 is shown as a circular disc having at least one port opening 530 .
  • the port opening 530 may vary in size and shape.
  • the opening formed for the exhalant to pass through is related to the alignment of the resistance window 528 with the port opening 530 .
  • the resistance window is moveably mounted relative to a fixed slide control portion attached to the mask.
  • Tabs 542 on the platform 526 preferably mate with tab receiving regions 544 on the end of the nosepiece extension 516 to retain the platform in a fixed position relative to the mask. Moving the tear-drop shaped resistance window 528 past the port opening 530 varies the exhalant path.
  • a plurality of resistance window openings 528 may be moved past the port 530 .
  • one end of the tear-drop shaped resistance window 528 matches the size of the largest port opening 530 at a maximum flow position thereby providing a maximum flow and least resistance in that position.
  • the valve cover is rotated so that the resistance window 528 covers a greater portion of the port, as shown in FIGS. 33 a - 33 b , a smaller exhalant path is created providing greater resistance.
  • moving the valve cover until the tab reaches the opposite end of the tab window results in the smallest amount of the port being open, the highest airflow resistance and the least flow.
  • FIG. 36 an embodiment is shown of a valve cover 550 having indicia 552 representative of a resistance setting.
  • the indicia 552 are arranged to cooperate with the tab extension 554 on the platform to indicate the current resistance setting.
  • PEP therapy may be performed with a mouthpiece or mask having the PP valve associated with a backpiece.
  • the mask or mouthpiece may have an extended inlet for association with the backpiece.
  • pressurized metered dose inhalers are generally cylindrical canisters with axially extending vent tubes from internal valves. When the external tube or stem of a pressurized metered dose inhaler canister is depressed it operates the internal valve to dispense a measured dose of medicine from the stem.
  • the medicine is commonly packed in the canister with a suitable compressed gas to propel the medicine and gas from the stem or tube when the later is depressed.
  • the medicine may be in gas, liquid, or solid form.
  • the manufacturer or distributor of the pressurized metered dose inhaler canister generally supplies it with a substantially L-shaped adapter which receives the canister in a substantially upright position, and has a substantial horizontal outlet portion for reception in the mouth of an asthmatic patient for inhalation of the medicine.
  • a spacer chamber with an integrated actuator, or an aerosol holding chamber have been used in attempts to overcome inappropriate particle size.
  • the aerosol holding chamber is generally provided at the upstream or entering end with a flexible, resilient adapter or backpiece made of rubber or the like material.
  • a central aperture is provided for receipt of the horizontal outlet portion of the pressurized metered dose inhaler adapter.
  • a PP apparatus 600 may be associated with the pressurized metered dose inhaler or the pressurized metered dose inhaler with an aerosol holding chamber.
  • an L-shaped adapter portion 602 holds the pressurized canister and a horizontal outlet section 604 receives the medicament released in aerosol form.
  • a one-way valve 606 which may be a flexible membrane, a rigid membrane, hinged door, or other commonly known valve mechanism is positioned at the proximal end 608 of the horizontal outlet section 604 .
  • the one-way valve 606 permits inhalation and blocks exhalation so that substantially all exhalation is routed through the variable resistance window 610 adjacent the one-way valve 606 .
  • a slide control 612 is movable in the resistance window 610 by a tab 614 to close off or open up as much of the resistance window as necessary to provide the desired expiratory pressure.
  • FIGS. 38 a and 39 a illustrate the slide control in a completely open position and FIGS. 38 b and 39 b illustrate the slide control closing off the resistance window.
  • the slide control may maintain its position in the resistance window through friction, detents or other known mechanisms for mechanically retaining one of multiple desired positions.
  • FIG. 40 illustrates another embodiment of a pressurized metered does inhaler 620 with a round proximal end 628 that may be used without the need for special mouthpieces or aerosol holding chambers.
  • the alternative PEP enabled pressurized metered dose inhaler 620 has a one-way valve 626 that shunts exhalant through a resistance window 622 that is continuously adjustable with a slide control 624 that can adjust the aperture of the resistance window.
  • a mouthpiece or mask may be associated the PP apparatus.
  • an aerosol holding chamber may be attached to the mouthpiece or mask end and a metered dose inhaler may be positioned on a generally opposite end of the chamber via a backpiece.
  • the user of the device may insert the mouthpiece into the mouth to obtain a dose of medicament. Further, the user may place the mask over the mouth and/or nose to inspire a dose of the medicament. In either situation, the mask or mouthpiece aids in the delivery of the medicament to the user.
  • a method and apparatus from providing positive expiration or inhalation therapy, with or without separate aerosol generating devices has been disclosed.
  • the positive expiratory pressure valve is located at or near the output end of the aerosol delivery apparatus
  • a one way inhalation valve can be located further downstream from the positive expiratory pressure valve.
  • a mouthpiece and or mask can be affixed at or near the output end of the aerosol delivery apparatus.
  • the positioning of the inhalation valve either upstream or downstream in respect to the positive expiratory pressure valve is well known to one skilled in the art. Further, it is envisioned that PEP therapy may be performed nasally with the positive expiratory pressure apparatus.
  • a one way inhalation valve is engageable with the mouthpiece.
  • the inhalation valve functions so as to allow for inhalation by the patient into the mouthpiece.
  • the exhalant of the patient is prevented from exiting via the inhalation valve and is directed to exit through the PP valve.
  • an inhalation valve opens upon inhalation to allow a fluid, such as an aerosol, to enter a chamber or channel or the like but that closes upon exhalation to prevent exhaled fluids to enter into the chamber of the like.
  • the drawings depict an exemplary embodiment of the one-way inhalation valve but are not to be limiting to the embodiments shown.
  • a physician may initially determine the proper resistance setting of the PP apparatus according to the patient's requirements.
  • One manner in which the PP apparatus may be properly set is by attaching a fitting 39 to the mouthpiece.
  • a manometer is then attached to the fitting port 41 and serves to measure the expiratory pressure.
  • a patient will exhale into the mouthpiece and the pressure can be read from the manometer.
  • the physician can the move the tab to one of the desired settings indicated on the mouthpiece.
  • the fitting 39 can be removed from the mouthpiece. This fitting 39 will not be used again unless it is determined that the resistance should be adjusted.
  • the method of performing PEP therapy using the PP apparatus includes performing a series of breaths. When exhalation is performed, the exhalant is directed through the continuously variable expiratory window. Performance of a therapeutic cough triggers the loosening of secretions. Upon loosening of the secretions, a medicament may be provided for inhalation into the respiratory system. In one embodiment of PEP therapy, the user will exhale into the mouthpiece and/or mask, against the desired resistance. This is done either prior to or in combination with inhalation of the medicament. The exhaled gases exit through the resistance window. This process may be repeated as many times as prescribed by the patient's physician.
  • the aerosol delivery apparatus with the PP apparatus may be used alone or in combination with a mask or mouthpiece. Also, an improved aerosol delivery apparatus with an integrated actuator has been shown, wherein the improvement comprises a PP valve.
  • the discussion above is descriptive, illustrative and exemplary and is not to be taken as limiting the scope defined by any appended claims.

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US09/833,019 US6557549B2 (en) 2000-04-11 2001-04-11 Aerosol delivery apparatus with positive expiratory pressure capacity
US10/389,257 US6848443B2 (en) 2000-04-11 2003-03-14 Aerosol delivery apparatus with positive expiratory pressure capacity
US11/655,039 USRE43174E1 (en) 2000-04-11 2007-01-18 Aerosol delivery apparatus
US13/371,787 USRE45068E1 (en) 2000-04-11 2012-02-13 Aerosol delivery apparatus
US14/340,146 USRE46050E1 (en) 2000-04-11 2014-07-24 Aerosol delivery apparatus

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US11/655,039 Expired - Lifetime USRE43174E1 (en) 2000-04-11 2007-01-18 Aerosol delivery apparatus
US13/371,787 Expired - Lifetime USRE45068E1 (en) 2000-04-11 2012-02-13 Aerosol delivery apparatus
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US13/371,787 Expired - Lifetime USRE45068E1 (en) 2000-04-11 2012-02-13 Aerosol delivery apparatus
US14/340,146 Expired - Lifetime USRE46050E1 (en) 2000-04-11 2014-07-24 Aerosol delivery apparatus

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EP1272243A2 (de) 2003-01-08
CA2826724C (en) 2016-02-02
USRE45068E1 (en) 2014-08-12
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CA2919286A1 (en) 2001-10-18
US6848443B2 (en) 2005-02-01
US20030226562A1 (en) 2003-12-11
US20020029779A1 (en) 2002-03-14
CA2406185A1 (en) 2001-10-18
CA2826724A1 (en) 2001-10-18
CA2406185C (en) 2011-03-15
DE60114393T2 (de) 2006-04-27
WO2001076671A2 (en) 2001-10-18
EP1272243B1 (de) 2005-10-26
USRE43174E1 (en) 2012-02-14
DE60114393D1 (de) 2005-12-01
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CA2733850A1 (en) 2001-10-18
CA2733850C (en) 2013-10-22

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